Friction draft-rigging.



J. F. OGONNOR.

FRICTION DRAFT RIGG-ING.

APPLICATION FILED ocT.15, 1908.

Patented Feb. 9, 1909.

2 SHEETS-SHEET 2.

VIII/lll uw r .11M I J. P. OCONNOR.y

FRIGTION DRAFT RIGGING. APPLICATION FILED 001.215,190e` 91 1,901 Patented Feb. 9, 1909.

2 SHEETS-SHEET 1.

UNITED STATES PATENT OFFICE. TOEN F. OCONNOR, 0F CHICAGO, ILLI-IFCI'S,` ACSIGNOE TO W. II. MINER COMPANY, OF CHICAGO,

. ILLINOIS, A CORPORATION OF ILLINOIS.

FRICTION DRAFTfRIGGI-NG.

No.o11,9o1.

Specification of Letters Patent.

Patented Feb.. 9, 1909.

To all whom it may concern:

Be it known that I, JOHN F. OCoNNoR, a citizen ofthe United States, residing in Chicago, in the county of Cook and State of Illinois, have invented a new ,and useful Improvenient in Friction Draftf- Rigging, of which the following is a specification.

My invention relates to improvements in friction draft rigging,

My invention consists in the novel construction of parts and devices and in the 'novel combinations of parts and devices herein shown and' described and more particularly specified in the claims.

In the accompanying drawing forming a part oi this specification., Figure, is a side elevation partly in central vertical longituf linal section o friction draft rigging'em.- bodying my invention, Fig, 2 1s a plan view partly in horizontal sect-ion on line '2--2 of Fig. 1. Fig. 3 is a. vertical cross section on line 3-*3 of Fig. 1; Fig. l is a detail cross section of the friction shell onl the line 1 -4 of Fig. l. Fig. 5 is a'detail rear end elevation of the friction shell. Fig. 6 is a detail rear elevation of the preliminary `compression follower. Fig, 7 is a detail rear elevation o f the end or Gap plate of the friction shell. Fig. 48 is a detail plan view of one of the friction blocks or shoes and Fig. 9 is a side elevation of In the drawing, A represents the center sills or draft members ot' the car to which the draft rigging is applied,A1 the front sill, B the draw-bar, B1 the draw-bar yoke, C the side plates or stop castings having front, rear andintermediate stops C1 C2 C3 C4 for the followers I) D1 to abut against.

E E1 are the draft rigging springs, the smaller one ,being inside the larger, the same bearing at oneend against the friction shoes F1 and at the -rear end against the preliminary compression follower F2, and through it against the 'friction shell F. VThe friction shell F has an internal' friction face f in sliding frictional engagement with the external friction faces f1 of the friction shoes or blocks F1. The preliminary compression follower F2 is furnished with bearing lugs f2 which extend .through the cap or end plate F3 of the friction shell, referably about one half inch so as to provide for a preliminary half inch compression of the springs or cushioning action before the friction devices F` F1 are forced to slide one in respect to the other.

` Fi1 of the friction shell whic The lugs f2 on the preliminary compression follower extend through suitable holes or Openings f1 in the cap or end plate Fa of the friction shell. i 'i The friction shoes or blocks F1 are furnished with a recess or cavity f to receive the front end of the inner or smaller spring E1; and the preliminary compression follower F is furnished with an inwardly projecting boss f6 which is surrounded by the rear coi of the outer or larger spring E1.

G is the wedge and g g anti-friction rollers interposed between the inclined faces g1 of the wedge and the inclined faces f1 of the friction shoes or blocks F1. The wedge G also has stop shoulders g2 cooperating with similar stop shoulders fs'ou the friction shoes to 'hold the lanti-friction rollers g in place. wedge Gr nas a coupling device g3, the same preferably oomarising' a double or slotted tongue-Like eX ension and cross pin g4 connecting the upper and lower members of such double extension, which is adapted to engage a. coupling device It, preferably of a hook-like construction, on the connecting rod or device H which extends longitudinally through springs and connects the friction shoes'F1 with the cap or end plate F3 of the friction shell F. The connectmg member H is preferably furnished with a screw threaded stem h1, secured by a nut 11.2 to said cap or end plateF?, sa'id'cap 'having a countersink or recess f to accommodate said threaded stem and nut. The friction shell F is furnished at its rear end with a' flange or shoulder f1 against which the preliminary compression follower F2' abuts. The preliminary compression follower F2 is furnished with a horizontal slot f11 to receive the rear end of theconnecting rod or member H and thus hold the same and the friction shoes and wedge and rollers from turning in respect to the friction shell; said preliminary compression follower being itself held from turning by the ca or end plate is prevented from` turning by guide lugs f12 thereon engaging guide slots f1? in the friction shell. The connecting bar or member I-I serves to hold the sprin s normally under initial tension or load, t e initial tension or compression thereof being preferably about one half inch. The connecting bar or member H also serves to hold all the parts assembled and-. also through its cooperative action with be very quickly assembled or put together.

The lugs f2 on the preliminary compression follower F and the corresponding openings in the cap or end plate lf3 of the friction Ashell are preferably made of two or more different forms or outlines so as to insure the samebeing readily and rightly put together in assembling.

In operation, the lugs f of the preliminary compression follower F2 extending through the cap or end plate F3 of the friction shell and engaging the rear follower, provide for a preliminary compression of the spring and a preliminary cushioning action before the friction devices F F1 are brought into action. The initial tension or compression under which the connecting bar or device holds the springs causes the cushioning mechanism of the 'draft rigging to remain always of the same proper standard length, notwithstanding the wear that may take place between the friction elements of the cushioning mechanism. The initial tension under which the springs are held should be, as before stated, approximately one half inch, so as to give the draft rigging provision for taking up a large amount of wear between the friction shoes and friction shell without affecting the normal action of the draft rigging. This initial tension under which the connecting device holds the springs also keeps all the parts in snug and proper engagement with each other.

I claim 1. ln a friction draft rigging, the combination with the draw-bar and followers, of a friction shell, friction shoes within the shell, a wedge, a preliminary compression follower interposed between one of the followers and the spring, a cap plate for the friction shell and a connecting bar between the wedge and cap plate, substantially as specified.

2. In a friction draft rigging, the combination with the draw-bar andfollowers, of a friction shell, friction shoes within the shell, a wedge, a'preliminary compression follower interposed between one of the followers and the spring, a cap plate for the friction shell, a connecting bar between the wedge and cap plate, and lugs extending through the cap plate to transmit movement from the follower to the preliminary compression follower, substantially as specified.

3. In a friction draft rigging, the combination with the draw-bar and followers, of a friction shell, friction shoes within the shell, a wedge, a preliminary compression follower interposed between onefof the followers and the spring, a cap plate for the friction shell and a connecting bar between the wedge and cap plate, said connecting bar and wedge having interengaging coupling devices, substantially as specified.

4. vIn a friction draft rigging, the combination with the draw-bar and followers, of a friction shell, friction shoes within the shell, a wedge, a preliminary compression follower interposed between one of the followers and the spring, a cap plate for the friction shell and a connecting bar between the wedge and cap plate, said connecting bar and wedge having interengaging coupling devices comprising a double tongue-like cxtension and a cross pin on the wedge and a hook member on the connecting bar, substantially as specified.

5. In a draft rigging, the combination with the draw-bar, yoke and followers and stops for the followers, of a friction shell, friction blocks within the shell, a wedge, a cap plate for the end of the shell and a connecting bar between the cap plate and the wedge, substantially as specified. l

In a draft rigging, the combination with the draw-bai', yoke and followers and stops for the followers, of a friction shell, frictin blocks within the shell, a wedge, a cap plate for the end of the shell and a connecting bar between the cap plate and the wedge, said connecting bar and cap plate having provision for preventing the wedge and friction shoes from turning in the friction shell, substantially as specified.

7. In a draft rigging, the combination with the draw-bar, yoke and followers and stops for the followers, of a friction shell, friction blocks within the shell, a wedge, a cap plate for the end of the shell and a connecting bar between the cap plate and the wedge, said connecting bar and cap plate having provision for preventing the wedge and friction shoes from turning in the friction shell, and a preliminary compression follower having lugs extending through said cap plate, substantially as specified.

JOHN F. OCONNOR. `Witnesses:

H. M. MUNDAY, PEARL ABRAMs. 

